Buffer overflow in Freerdp
CVE-2026-110839
FreeRDP 3.3.0 before 3.32.0, when built with WINPR_UTILS_IMAGE_JPEG=ON, has a heap-based out-of-bounds write in winpr_convert_from_jpeg because grayscale JPEG buffers are sized from one input component rather than three BGR output components. A malicious RDP server can offer a grayscale JPEG via clipboard redirection, corrupting client memory and crashing it when the item is pasted as CF_DIB bitmap data.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/FreeRDP/FreeRDP/security/advisories/GHSA-99p4-8j24-wvj4 (vendor-advisory)
- www.vulncheck.com/advisories/freerdp-3.3.0-before-3.32.0-heap-out-of-bounds-wri… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-110839?
- CVE-2026-110839 is a high-severity vulnerability in Freerdp, classified under Out-of-bounds Write. CVSS score: 7.1/10. Published 2026-10-14.
- How severe is CVE-2026-110839?
- High severity. CVSS v3 base score is 7.1 out of 10.